[WIP] Ways to paint a backbone on a tree Say I have some unlabelled tree graph: I'll define a "backbone" as a path on a graph that can't be extended - both its ends are at terminal vertices. There are three ways to overlay a backbone on the above graph: However, you might notice that the first ...

Sandbox Have y'all ever written an answer with unprintable ASCII characters in it and wished that there was an easy way to represent those characters in a printable way? Well, that's why the Control Pictures Unicode block was invented. However, manually substituting these characters into one'...

Sum of cubes Challenge Given three non-negative integers \$a, b\$ and \$c\$, decide if sum of their cubes is equal to concatenation of said numbers, aka: $$ a^{3}+b^{3}+c^{3} = a^\frown b ^\frown c $$ Test cases Truthy (1,5,3) // 1^3 + 5^3 + 3^3 = 153 (2,3,13) (4,0,7) (10,0,0) (10,0,1) (22,18,59)...

Parse the stack signature of Uiua expressions code-golf parsing uiua In this challenge, you will be given an expression in a Uiua-like language called Weewuh, and determine the stack signature of that expression. Weewuh is a very reduced version of Uiua designed to make this challenge simpler; as...

Parsing expressions In challenges dealing with algebraic expressions, don't make the golfer parse input strings like x^3-2x+1 or e^2^x, or to output in this form. This is cumbersome I/O that takes a lot of bytes and effort in languages that aren't like Mathematica, distracting from the actual mat...